In this paper, the adsorption behavior of dyes from contaminated water on a novel polyaniline Fe–Ni nano-oxides, prepared by hydrothermal synthesis, was investigated. Polyaniline Fe–Ni nano-oxides were characterized by means of Fourier transform infrared spectroscopy, thermogravimetric differential thermal analysis, and X-ray diffraction. As the solution’s reaction temperature rises, so does the distribution coefficient (Kd). Batch systems were used for the adsorption investigations. The results demonstrated that the amount of bromophenol blue and phenol red adsorbed decreased as the pH increased. The isothermal data demonstrated an excellent match to the Langmuir than Freundlich models, pseudo-second-order kinetics were determined to most accurately represent the kinetic data. The Langmuir model calculated a maximal sorption capacity of 181.16 and 22.95 mg/g for adsorption of bromophenol blue and phenol red respectively. The average particle size was measured to be 26.76 nm.
Alqahtany et al. (Tue,) studied this question.